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Date: Fri, 12 Apr 2002 17:37:00 -0000
Message-ID: <20020413003745.11543.qmail@sources.redhat.com>
To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, janis187@us.ibm.com,
  nobody@gcc.gnu.org
From: rth@gcc.gnu.org
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  janis187@us.ibm.com, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Subject: Re: target/6137: ia64 -O3 generates bad overlapping memory accesses
X-SW-Source: 2002-04/txt/msg00684.txt.bz2
List-Id: <gcc-prs.sourceware.org>

Synopsis: ia64 -O3 generates bad overlapping memory accesses

State-Changed-From-To: open->analyzed
State-Changed-By: rth
State-Changed-When: Fri Apr 12 17:37:44 2002
State-Changed-Why:
    It's another damned RTX_UNCHANGING_P bug.
    
    (insn 85 84 88 (set (reg/v/f:DI 361)
            (plus:DI (reg/f:DI 328 sfp)
                (const_int 48 [0x30]))) 90 {adddi3} (nil)
        (nil))
    (insn 98 97 99 (set (mem/s:DI (reg/v/f:DI 361) [0 S8 A64])
            (reg:DI 365)) 6 {*movdi_internal} (nil)
        (nil))
    (insn 133 131 134 (set (reg:DI 375)
            (mem/s/u:DI (reg/v/f:DI 361) [0 S8 A128])) 6 {*movdi_internal} (nil)
        (nil))
    
    The load doesn't conflict with the store.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6137